diff --git a/.gitignore b/.gitignore
index ad3cd24..f8aea42 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,6 +7,10 @@ java/build/
 
 # third_party — only fftw is downloaded manually, rnnoise and libspecbleach are tracked
 third_party/fftw/
+third_party/**/*.o
+third_party/**/*.a
+third_party/fftw-3.3.11.tar.gz
+third_party/fftw-3.3.11/
 
 # macOS
 .DS_Store
diff --git a/Makefile.android b/Makefile.android
index a540ea5..5ce574d 100644
--- a/Makefile.android
+++ b/Makefile.android
@@ -5,17 +5,39 @@
 # Optional overrides:
 #   ANDROID_NDK=/path/to/ndk ANDROID_API=24 ANDROID_ABIS="arm64-v8a x86_64"
 #
-# Requires FFTW source in third_party/fftw/
-#   Download from https://www.fftw.org/download.html and extract so that
-#   third_party/fftw/configure exists.
+# FFTW source is downloaded and extracted automatically.
+# Override FFTW_SRC to use an existing directory.
 
-ANDROID_NDK ?= /home/vladimir/Android/Sdk/ndk/29.0.14206865
+# Auto-detect NDK path (can always be overridden by setting ANDROID_NDK explicitly):
+#   1. ANDROID_NDK_HOME environment variable
+#   2. Latest NDK under ANDROID_SDK_ROOT or ANDROID_HOME
+#   3. Default SDK locations: ~/Android/Sdk (Linux) or ~/Library/Android/sdk (macOS)
+ifeq ($(origin ANDROID_NDK),undefined)
+  ifdef ANDROID_NDK_HOME
+    ANDROID_NDK := $(ANDROID_NDK_HOME)
+  else
+    _SDK_ROOT := $(or $(ANDROID_SDK_ROOT),$(ANDROID_HOME),\
+                   $(wildcard $(HOME)/Android/Sdk),\
+                   $(wildcard $(HOME)/Library/Android/sdk))
+    ifdef _SDK_ROOT
+      ANDROID_NDK := $(lastword $(sort $(wildcard $(_SDK_ROOT)/ndk/*)))
+    endif
+  endif
+endif
+ifndef ANDROID_NDK
+  $(error Cannot find Android NDK. Set ANDROID_NDK, ANDROID_NDK_HOME, ANDROID_SDK_ROOT, or ANDROID_HOME)
+endif
 ANDROID_API ?= 24
 ANDROID_ABIS ?= arm64-v8a armeabi-v7a x86_64
 ANDROID_HOST_TAG ?= $(shell uname -s | tr '[:upper:]' '[:lower:]' | sed 's/darwin/darwin/;s/linux/linux/')-$(shell uname -m | sed 's/aarch64/arm64/;s/x86_64/x86_64/')
 
-JBR_BIN ?= /opt/android-studio/jbr/bin
-JAVAC ?= $(JBR_BIN)/javac
+# Auto-detect javac: JAVA_HOME > system PATH > Android Studio JBR (Linux/macOS)
+_JAVAC_CANDIDATES := \
+  $(if $(JAVA_HOME),$(wildcard $(JAVA_HOME)/bin/javac)) \
+  $(shell command -v javac 2>/dev/null) \
+  $(wildcard /opt/android-studio/jbr/bin/javac) \
+  $(wildcard /Applications/Android\ Studio.app/Contents/jbr/Contents/Home/bin/javac)
+JAVAC ?= $(firstword $(_JAVAC_CANDIDATES))
 
 TOOLCHAIN := $(ANDROID_NDK)/toolchains/llvm/prebuilt/$(ANDROID_HOST_TAG)
 
@@ -24,7 +46,10 @@ COMMON_CPPFLAGS ?= -I. -I third_party/rnnoise/include -I third_party/libspecblea
 ANDROID_JNI_CFLAGS ?= -std=gnu89 -Wno-implicit-function-declaration -Wno-int-conversion \
   -Wno-incompatible-pointer-types -Wno-incompatible-pointer-types-discards-qualifiers
 
-FFTW_SRC ?= third_party/fftw
+FFTW_VERSION  := 3.3.11
+FFTW_TAR      := fftw-$(FFTW_VERSION).tar.gz
+FFTW_URL      := https://fftw.org/pub/fftw/$(FFTW_TAR)
+FFTW_SRC      ?= third_party/fftw-$(FFTW_VERSION)
 FFTW_MAKEJOBS ?= $(shell nproc 2>/dev/null || sysctl -n hw.ncpu 2>/dev/null || echo 4)
 
 WDSP_SOURCES = amd.c \
@@ -148,9 +173,9 @@ ANDROID_OBJ_ROOT  := obj/android
 ANDROID_LIB_ROOT  := lib/android
 ANDROID_JAVA_OUT  := lib/android/java
 
-.PHONY: all clean java-classes check-fftw-src
+.PHONY: all clean distclean java-classes
 
-all: check-fftw-src \
+all: $(FFTW_SRC)/configure \
   $(foreach abi,$(ANDROID_ABIS),\
     $(ANDROID_LIB_ROOT)/$(abi)/libfftw3.so \
     $(ANDROID_LIB_ROOT)/$(abi)/libfftw3f.so \
@@ -158,15 +183,21 @@ all: check-fftw-src \
     $(ANDROID_LIB_ROOT)/$(abi)/libwdspj.so) \
   java-classes
 
-check-fftw-src:
-	@test -f $(FFTW_SRC)/configure || { \
-	  echo ""; \
-	  echo "ERROR: FFTW source not found at $(FFTW_SRC)/configure"; \
-	  echo "Download and extract FFTW from https://www.fftw.org/download.html"; \
-	  echo "so that $(FFTW_SRC)/configure exists."; \
-	  echo ""; \
-	  exit 1; \
-	}
+# ── Автоматическое получение FFTW ────────────────────────────────────────────
+
+third_party/$(FFTW_TAR):
+	mkdir -p third_party
+	@echo ">>> Скачиваем FFTW $(FFTW_VERSION)..."
+	@if command -v wget >/dev/null 2>&1; then \
+	  wget -q --show-progress -O $@ "$(FFTW_URL)"; \
+	else \
+	  curl -L --progress-bar -o $@ "$(FFTW_URL)"; \
+	fi
+
+$(FFTW_SRC)/configure: third_party/$(FFTW_TAR)
+	@echo ">>> Распаковываем FFTW..."
+	tar xf $< -C third_party/
+	@touch $@
 
 # abi_target: compiler triple for NDK clang wrapper
 define abi_target
@@ -226,11 +257,12 @@ ABI_$(1)_WDSP_OBJS := $$(patsubst %.c,$$(ABI_$(1)_OBJDIR)/%.o,$$(ALL_C_SOURCES))
 ABI_$(1)_JNI_OBJ   := $$(ABI_$(1)_OBJDIR)/$(JNI_SOURCE:.c=.o)
 
 # --- Build fftw3 (double) ---
-$$(ABI_$(1)_FFTW_STAMP):
+$$(ABI_$(1)_FFTW_STAMP): $(FFTW_SRC)/configure
 	@mkdir -p $$(ABI_$(1)_OBJDIR)/fftw-build $$(ABI_$(1)_FFTW_PREFIX)
 	cd $$(ABI_$(1)_OBJDIR)/fftw-build && \
 	  $(abspath $(FFTW_SRC))/configure \
-	    --host=$(call fftw_host,$(1)) \
+	    --build=$(shell uname -m)-linux-gnu \
+	    --host=$(strip $(call fftw_host,$(1))) \
 	    CC="$$(ABI_$(1)_CC)" \
 	    CFLAGS="-fPIC" \
 	    --prefix=$(abspath $$(ABI_$(1)_FFTW_PREFIX)) \
@@ -240,11 +272,12 @@ $$(ABI_$(1)_FFTW_STAMP):
 	@touch $$@
 
 # --- Build fftw3f (float/single) ---
-$$(ABI_$(1)_FFTWF_STAMP):
+$$(ABI_$(1)_FFTWF_STAMP): $(FFTW_SRC)/configure
 	@mkdir -p $$(ABI_$(1)_OBJDIR)/fftwf-build $$(ABI_$(1)_FFTWF_PREFIX)
 	cd $$(ABI_$(1)_OBJDIR)/fftwf-build && \
 	  $(abspath $(FFTW_SRC))/configure \
-	    --host=$(call fftw_host,$(1)) \
+	    --build=$(shell uname -m)-linux-gnu \
+	    --host=$(strip $(call fftw_host,$(1))) \
 	    CC="$$(ABI_$(1)_CC)" \
 	    CFLAGS="-fPIC" \
 	    --prefix=$(abspath $$(ABI_$(1)_FFTWF_PREFIX)) \
@@ -311,3 +344,6 @@ java-classes: $(JAVA_SOURCE)
 
 clean:
 	rm -rf $(ANDROID_OBJ_ROOT) $(ANDROID_LIB_ROOT)
+
+distclean: clean
+	-rm -rf $(FFTW_SRC) third_party/$(FFTW_TAR)
diff --git a/Makefile.windows b/Makefile.windows
new file mode 100644
index 0000000..0730dec
--- /dev/null
+++ b/Makefile.windows
@@ -0,0 +1,294 @@
+#
+# Makefile.windows — кросс-компиляция WDSP для 64-bit Windows на Linux (MinGW-w64)
+#
+# Использование:
+#   make -f Makefile.windows            # DLL + статическая библиотека
+#   make -f Makefile.windows dll        # только DLL
+#   make -f Makefile.windows static     # только статическая библиотека
+#   make -f Makefile.windows clean      # удалить артефакты сборки
+#   make -f Makefile.windows distclean  # + удалить собранный и скачанный FFTW
+#
+# Зависимости (установить до запуска):
+#   Arch:    sudo pacman -S mingw-w64-gcc         (тянет mingw-w64-headers автоматически)
+#   Debian:  sudo apt install mingw-w64            (мета-пакет: компилятор + заголовки + CRT)
+#   Fedora:  sudo dnf install mingw64-gcc          (тянет mingw64-headers автоматически)
+#   + wget или curl, tar
+#
+
+MINGW_PREFIX ?= x86_64-w64-mingw32
+
+CC     := $(MINGW_PREFIX)-gcc
+AR     := $(MINGW_PREFIX)-ar
+RANLIB := $(MINGW_PREFIX)-ranlib
+
+CFLAGS  ?= -O3 -Wno-parentheses -Wno-incompatible-pointer-types
+LDFLAGS ?=
+
+# ── FFTW: сборка из исходников ────────────────────────────────────────────────
+
+FFTW_VERSION := 3.3.11
+FFTW_TAR     := fftw-$(FFTW_VERSION).tar.gz
+FFTW_URL     := https://fftw.org/pub/fftw/$(FFTW_TAR)
+
+# Абсолютные пути — нужны для configure --prefix и sub-make -C
+FFTW_SRC     := $(CURDIR)/third_party/fftw-$(FFTW_VERSION)
+FFTW_INST    := $(CURDIR)/third_party/fftw-win64
+
+# Раздельные build-директории для double и float precision
+FFTW_BUILD_D := $(FFTW_INST)/build-double
+FFTW_BUILD_F := $(FFTW_INST)/build-float
+
+# FFTW_MARCH задаёт минимальный набор инструкций для Windows-бинарника.
+# haswell (2013+) гарантирует AVX2+FMA — оптимальный выбор для SDR на современном ПК.
+# Для совместимости со старыми машинами замените на -march=sandybridge (AVX, 2011+)
+# или -march=core2 (SSSE3, 2007+).
+FFTW_MARCH ?= -march=haswell
+
+FFTW_CONF_COMMON = \
+  --host=$(MINGW_PREFIX) \
+  CC=$(CC) \
+  CFLAGS="$(FFTW_MARCH)" \
+  --prefix=$(FFTW_INST) \
+  --enable-shared \
+  --disable-static \
+  --with-our-malloc \
+  --enable-sse2 \
+  --enable-avx \
+  --enable-avx2 \
+  --disable-fortran \
+  --quiet
+
+# Sentinel-файлы для отслеживания готовности FFTW
+FFTW_HEADER := $(FFTW_INST)/include/fftw3.h
+FFTW_LIB_D  := $(FFTW_INST)/lib/libfftw3.dll.a
+FFTW_LIB_F  := $(FFTW_INST)/lib/libfftw3f.dll.a
+FFTW_DLL_D  := $(FFTW_INST)/bin/libfftw3-3.dll
+FFTW_DLL_F  := $(FFTW_INST)/bin/libfftw3f-3.dll
+
+# ── Выходные директории и файлы ───────────────────────────────────────────────
+
+OBJDIR := obj_win
+OUTDIR := lib_win
+
+DLL        := $(OUTDIR)/libwdsp.dll
+IMPLIB     := $(OUTDIR)/libwdsp.dll.a
+STATIC_LIB := $(OUTDIR)/libwdsp.a
+
+# ── Исходники (копия из основного Makefile) ───────────────────────────────────
+
+SOURCES = \
+  amd.c ammod.c amsq.c analyzer.c anf.c anr.c apfshadow.c \
+  bandpass.c calcc.c calculus.c cblock.c cfcomp.c cfir.c \
+  channel.c cmath.c compress.c delay.c dexp.c div.c doublepole.c \
+  eer.c emnr.c emph.c eq.c fcurve.c FDnoiseIQ.c fir.c firmin.c \
+  fmd.c fmmod.c fmsq.c gain.c gaussian.c gen.c icfir.c iir.c \
+  impulse_cache.c iobuffs.c iqc.c linux_port.c lmath.c main.c \
+  matchedCW.c meter.c meterlog10.c nbp.c nob.c nobII.c osctrl.c \
+  patchpanel.c resample.c rmatch.c rnnr.c RXA.c sbnr.c sender.c \
+  shift.c siphon.c slew.c snb.c ssql.c syncbuffs.c TXA.c \
+  utilities.c varsamp.c version.c wcpAGC.c wisdom.c zetaHat.c
+
+OBJS := $(addprefix $(OBJDIR)/, $(SOURCES:.c=.o))
+
+# ── NR3/NR4: исходники third-party ────────────────────────────────────────────
+#
+# Компилируем rnnoise и libspecbleach напрямую в obj_win/, минуя их sub-make.
+# Это исключает конфликт с Linux-сборкой: third_party/*.a содержат ELF-объекты,
+# и если они "свежее" исходников, sub-make считает их up-to-date и не пересобирает.
+
+RNNOISE_DIR    := third_party/rnnoise
+SPECBLEACH_DIR := third_party/libspecbleach
+
+RNNOISE_SRCS := \
+  src/denoise.c src/celt_lpc.c src/kiss_fft.c src/nnet.c \
+  src/nnet_default.c src/parse_lpcnet_weights.c src/pitch.c \
+  src/rnn.c src/rnnoise_data.c \
+  src/rnnoise_data_1.c src/rnnoise_data_2.c src/rnnoise_data_3.c \
+  src/rnnoise_data_4.c src/rnnoise_data_5.c src/rnnoise_data_6.c \
+  src/rnnoise_tables.c
+
+SPECBLEACH_SRCS := \
+  src/processors/specbleach_adenoiser.c \
+  src/processors/specbleach_denoiser.c \
+  src/processors/adaptivedenoiser/adaptive_denoiser.c \
+  src/shared/gain_estimation/gain_estimators.c \
+  src/shared/noise_estimation/adaptive_noise_estimator.c \
+  src/shared/pre_estimation/absolute_hearing_thresholds.c \
+  src/shared/pre_estimation/critical_bands.c \
+  src/shared/pre_estimation/masking_estimator.c \
+  src/shared/pre_estimation/noise_scaling_criterias.c \
+  src/shared/pre_estimation/spectral_smoother.c \
+  src/shared/pre_estimation/transient_detector.c \
+  src/shared/post_estimation/noise_floor_manager.c \
+  src/shared/post_estimation/postfilter.c \
+  src/shared/post_estimation/spectral_whitening.c \
+  src/shared/utils/denoise_mixer.c \
+  src/shared/utils/general_utils.c \
+  src/shared/utils/spectral_features.c \
+  src/shared/utils/spectral_utils.c \
+  src/shared/stft/stft_processor.c \
+  src/shared/stft/fft_transform.c \
+  src/shared/stft/stft_buffer.c \
+  src/shared/stft/stft_windows.c
+
+RNNOISE_OBJS    := $(addprefix $(OBJDIR)/rnnoise/, $(RNNOISE_SRCS:.c=.o))
+SPECBLEACH_OBJS := $(addprefix $(OBJDIR)/specbleach/, $(SPECBLEACH_SRCS:.c=.o))
+
+RNNOISE_LIB    := $(OUTDIR)/librnnoise.a
+SPECBLEACH_LIB := $(OUTDIR)/libspecbleach.a
+
+# ── Флаги компиляции ──────────────────────────────────────────────────────────
+
+NR34_INC  := -I$(RNNOISE_DIR)/include -I$(SPECBLEACH_DIR)/include
+FFTW_INC  := -I$(FFTW_INST)/include
+
+COMPILE   := $(CC) $(CFLAGS) $(FFTW_INC) $(NR34_INC)
+
+NR34_DEPS := $(RNNOISE_LIB) $(SPECBLEACH_LIB)
+
+# avrt нужен т.к. comm.h включает <avrt.h> под _WIN32
+LINK_LIBS := $(NR34_DEPS) \
+             -L$(FFTW_INST)/lib -lfftw3 -lfftw3f \
+             -lavrt -lm
+
+# ── Цели ──────────────────────────────────────────────────────────────────────
+
+.PHONY: all dll static fftw fftw-double fftw-float third-party check-tools clean distclean
+
+all: dll static
+
+dll:    check-tools fftw third-party $(DLL)
+static: check-tools fftw third-party $(STATIC_LIB)
+
+# ── Проверка инструментов ─────────────────────────────────────────────────────
+
+check-tools:
+	@command -v $(CC) >/dev/null 2>&1 || { \
+	  echo ""; \
+	  echo "ОШИБКА: $(CC) не найден. Установите mingw-w64:"; \
+	  echo "  Arch:    sudo pacman -S mingw-w64-gcc"; \
+	  echo "  Debian:  sudo apt install mingw-w64"; \
+	  echo "  Fedora:  sudo dnf install mingw64-gcc"; \
+	  echo ""; exit 1; }
+	@echo '#include <windows.h>' | $(CC) -x c - -fsyntax-only -Wno-pragma-once-outside-header 2>/dev/null || { \
+	  echo ""; \
+	  echo "ОШИБКА: Windows API заголовки не найдены."; \
+	  echo "Установите пакет с заголовками MinGW-w64:"; \
+	  echo "  Arch:    sudo pacman -S mingw-w64-headers"; \
+	  echo "  Debian:  sudo apt install mingw-w64          # не gcc-mingw-w64-x86-64!"; \
+	  echo "  Fedora:  sudo dnf install mingw64-headers"; \
+	  echo ""; exit 1; }
+	@(command -v wget >/dev/null 2>&1 || command -v curl >/dev/null 2>&1) || { \
+	  echo "ОШИБКА: требуется wget или curl"; exit 1; }
+
+# ── FFTW: скачать исходники → собрать double → собрать float ──────────────────
+
+fftw: fftw-double fftw-float
+
+# Шаг 1: скачать tarball
+third_party/$(FFTW_TAR):
+	mkdir -p third_party
+	@echo ">>> Скачиваем FFTW $(FFTW_VERSION)..."
+	@if command -v wget >/dev/null 2>&1; then \
+	  wget -q --show-progress -O $@ "$(FFTW_URL)"; \
+	else \
+	  curl -L --progress-bar -o $@ "$(FFTW_URL)"; \
+	fi
+
+# Шаг 2: распаковать
+$(FFTW_SRC)/configure: third_party/$(FFTW_TAR)
+	@echo ">>> Распаковываем FFTW..."
+	tar xf $< -C third_party/
+	@touch $@
+
+# Шаг 3a: configure для double precision
+$(FFTW_BUILD_D)/Makefile: $(FFTW_SRC)/configure
+	mkdir -p $(FFTW_BUILD_D)
+	@echo ">>> Конфигурируем FFTW (double)..."
+	cd $(FFTW_BUILD_D) && $(FFTW_SRC)/configure $(FFTW_CONF_COMMON)
+
+# Шаг 4a: сборка и установка double precision
+fftw-double: $(FFTW_LIB_D)
+$(FFTW_LIB_D): $(FFTW_BUILD_D)/Makefile
+	@echo ">>> Собираем FFTW (double)..."
+	$(MAKE) -C $(FFTW_BUILD_D) install
+
+# Шаг 3b: configure для float precision (--enable-float)
+$(FFTW_BUILD_F)/Makefile: $(FFTW_SRC)/configure
+	mkdir -p $(FFTW_BUILD_F)
+	@echo ">>> Конфигурируем FFTW (float)..."
+	cd $(FFTW_BUILD_F) && $(FFTW_SRC)/configure $(FFTW_CONF_COMMON) --enable-float
+
+# Шаг 4b: сборка и установка float precision
+# Зависит от fftw-double чтобы install-шаги не конкурировали за prefix
+fftw-float: $(FFTW_LIB_F)
+$(FFTW_LIB_F): $(FFTW_BUILD_F)/Makefile $(FFTW_LIB_D)
+	@echo ">>> Собираем FFTW (float)..."
+	$(MAKE) -C $(FFTW_BUILD_F) install
+
+# ── Third-party библиотеки (кросс-компиляция) ─────────────────────────────────
+
+third-party: $(NR34_DEPS)
+
+$(RNNOISE_LIB): $(RNNOISE_OBJS) | $(OUTDIR)
+	$(AR) rv $@ $^
+	$(RANLIB) $@
+
+$(SPECBLEACH_LIB): $(SPECBLEACH_OBJS) | $(OUTDIR)
+	$(AR) rv $@ $^
+	$(RANLIB) $@
+
+# % в GNU make совпадает через '/', поэтому паттерн покрывает вложенные пути
+$(OBJDIR)/rnnoise/%.o: $(RNNOISE_DIR)/%.c
+	@mkdir -p $(@D)
+	$(CC) $(CFLAGS) -I$(RNNOISE_DIR)/include -I$(RNNOISE_DIR)/src -c -o $@ $<
+
+$(OBJDIR)/specbleach/%.o: $(SPECBLEACH_DIR)/%.c | $(FFTW_LIB_D)
+	@mkdir -p $(@D)
+	$(CC) $(CFLAGS) -I$(FFTW_INST)/include \
+	  -I$(SPECBLEACH_DIR)/include -I$(SPECBLEACH_DIR)/src -I$(SPECBLEACH_DIR)/src/shared \
+	  -c -o $@ $<
+
+# ── Основная библиотека ───────────────────────────────────────────────────────
+
+$(OUTDIR) $(OBJDIR):
+	mkdir -p $@
+
+$(DLL): $(OBJS) $(NR34_DEPS) $(FFTW_LIB_D) $(FFTW_LIB_F) | $(OUTDIR)
+	@echo ">>> Линкуем $@..."
+	$(CC) -shared \
+	  -Wl,--out-implib,$(IMPLIB) \
+	  $(LDFLAGS) \
+	  -o $@ \
+	  $(OBJS) $(LINK_LIBS)
+	@cp $(FFTW_DLL_D) $(FFTW_DLL_F) $(OUTDIR)/
+	@echo ""
+	@echo "=== Готово ==="
+	@echo "  DLL:        $(DLL)"
+	@echo "  Import lib: $(IMPLIB)"
+	@echo "  Заголовок:  wdsp.h"
+	@echo ""
+	@echo "  FFTW DLL скопированы в $(OUTDIR)/ — включите их в дистрибутив"
+	@echo "  рядом с libwdsp.dll."
+
+$(STATIC_LIB): $(OBJS) | $(OUTDIR)
+	$(AR) rv $@ $(OBJS)
+	$(RANLIB) $@
+	@echo ""
+	@echo "=== Готово ==="
+	@echo "  Статическая: $(STATIC_LIB)"
+	@echo "  Линкуйте приложение с:"
+	@echo "    $(STATIC_LIB) $(NR34_DEPS)"
+	@echo "    -L$(FFTW_INST)/lib -lfftw3 -lfftw3f -lavrt -lm"
+
+$(OBJDIR)/%.o: %.c | $(OBJDIR) $(FFTW_LIB_D)
+	$(COMPILE) -c -o $@ $<
+
+# ── Очистка ───────────────────────────────────────────────────────────────────
+
+clean:
+	-rm -rf $(OBJDIR) $(OUTDIR)
+
+# distclean удаляет собранный и скачанный FFTW — при следующем запуске пересоберётся
+distclean: clean
+	-rm -rf $(FFTW_INST) $(FFTW_SRC) third_party/$(FFTW_TAR)
diff --git a/README.md b/README.md
index 3887eb6..b513d91 100644
--- a/README.md
+++ b/README.md
@@ -13,14 +13,18 @@ wdsp/
 ├── org_openhpsdr_dsp_Wdsp.c/.h  — JNI bridge
 ├── Makefile                     — host build (Linux / macOS)
 ├── Makefile.android             — Android cross-build
+├── Makefile.windows             — Windows cross-build (MinGW-w64, runs on Linux)
 ├── java/
 │   └── org/openhpsdr/dsp/Wdsp.java
 ├── third_party/
-│   ├── fftw/              — FFTW source (download manually, see below)
+│   ├── fftw-3.3.11/       — FFTW source (downloaded automatically)
+│   ├── fftw-win64/        — FFTW Windows binaries (downloaded automatically)
 │   ├── rnnoise/           — RNNoise noise suppression
 │   └── libspecbleach/     — spectral noise reduction
 ├── obj/                   — object files (generated)
-└── lib/                   — built libraries (generated)
+├── obj_win/               — Windows object files (generated)
+├── lib/                   — built libraries (generated)
+└── lib_win/               — Windows libraries (generated)
 ```
 
 ---
@@ -81,20 +85,95 @@ make clean
 
 ---
 
+## Windows build (кросс-компиляция с Linux)
+
+Сборка выполняется на Linux с помощью MinGW-w64. FFTW скачивается и собирается из исходников автоматически.
+
+### Зависимости
+
+```bash
+# Arch
+sudo pacman -S mingw-w64-gcc        # тянет mingw-w64-headers автоматически
+
+# Debian / Ubuntu — нужен мета-пакет mingw-w64, а не только компилятор
+sudo apt install mingw-w64
+
+# Fedora
+sudo dnf install mingw64-gcc        # тянет mingw64-headers автоматически
+```
+
+Также нужен `wget` или `curl`.
+
+> **Debian/Ubuntu:** пакет `gcc-mingw-w64-x86-64` содержит только компилятор без Windows API заголовков — `Windows.h` не будет найден. Используйте `mingw-w64`.
+
+### Сборка
+
+```bash
+# DLL + статическая библиотека (рекомендуется)
+make -f Makefile.windows
+
+# Только DLL
+make -f Makefile.windows dll
+
+# Только статическая библиотека
+make -f Makefile.windows static
+```
+
+Результат в `lib_win/`:
+
+| Файл | Назначение |
+|---|---|
+| `libwdsp.dll` | DLL для Windows |
+| `libwdsp.dll.a` | Import library для MinGW (`-lwdsp`) |
+| `libwdsp.a` | Статическая библиотека |
+| `libfftw3-3.dll` | Runtime dependency — распространять вместе с DLL |
+| `libfftw3f-3.dll` | Runtime dependency — распространять вместе с DLL |
+
+### Линковка приложения
+
+**MinGW:**
+```bash
+gcc myapp.c -Llib_win -lwdsp -o myapp.exe
+```
+
+**MSVC** — переименовать `libwdsp.dll.a` в `libwdsp.lib` и подключить обычным образом.
+
+**Статически** (MinGW):
+```bash
+gcc myapp.c libwdsp.a third_party/rnnoise/librnnoise.a \
+    third_party/libspecbleach/libspecbleach.a \
+    -Lthird_party/fftw-win64 -lfftw3-3 -lfftw3f-3 -lavrt -lm -o myapp.exe
+```
+
+### Параметры
+
+| Переменная | По умолчанию | Описание |
+|---|---|---|
+| `MINGW_PREFIX` | `x86_64-w64-mingw32` | Префикс MinGW toolchain |
+| `FFTW_VERSION` | `3.3.11` | Версия FFTW |
+| `CFLAGS` | `-O3 -Wno-parentheses` | Флаги компилятора |
+
+```bash
+make -f Makefile.windows MINGW_PREFIX=i686-w64-mingw32   # 32-bit Windows
+```
+
+### Очистка
+
+```bash
+make -f Makefile.windows clean       # артефакты сборки
+make -f Makefile.windows distclean   # + удалить скачанный FFTW
+```
+
+---
+
 ## Android build
 
 ### Prerequisites
 
 1. **Android NDK** r23 or newer
-2. **FFTW source** — download and extract into `third_party/fftw/`:
+2. **Java compiler** — for building the `.class` file (Android Studio's JBR or any JDK)
 
-```bash
-wget https://www.fftw.org/fftw-3.3.10.tar.gz
-tar xf fftw-3.3.10.tar.gz
-mv fftw-3.3.10 third_party/fftw
-```
-
-3. **Java compiler** — for building the `.class` file (Android Studio's JBR or any JDK)
+FFTW 3.3.11 скачивается и собирается автоматически. Чтобы использовать уже скачанный исходник, передайте `FFTW_SRC=/path/to/fftw-3.3.11`.
 
 ### Build
 
@@ -144,8 +223,8 @@ make -f Makefile.android \
 ### Clean
 
 ```bash
-make -f Makefile.android clean
-# removes obj/android/ and lib/android/
+make -f Makefile.android clean       # удаляет obj/android/ и lib/android/
+make -f Makefile.android distclean   # + удаляет скачанный FFTW
 ```
 
 ---
diff --git a/comm.h b/comm.h
index 2477e36..796ad85 100644
--- a/comm.h
+++ b/comm.h
@@ -33,7 +33,7 @@ warren@wpratt.com
 #endif
 
 #ifdef _WIN32
-#include <Windows.h>
+#include <windows.h>
 #include <process.h>
 #include <intrin.h>
 #endif
@@ -43,6 +43,11 @@ warren@wpratt.com
 #ifdef _WIN32
 #include <avrt.h>
 #endif
+
+#ifndef WDSP_FPE_GUARD
+#define WDSP_FPE_GUARD   ((void)0)
+#define WDSP_FPE_RESTORE ((void)0)
+#endif
 #include "fftw3.h"
 
 #include "amd.h"
diff --git a/third_party/libspecbleach/libspecbleach.a b/third_party/libspecbleach/libspecbleach.a
deleted file mode 100644
index 76e3ab4..0000000
Binary files a/third_party/libspecbleach/libspecbleach.a and /dev/null differ
diff --git a/third_party/libspecbleach/src/processors/adaptivedenoiser/adaptive_denoiser.o b/third_party/libspecbleach/src/processors/adaptivedenoiser/adaptive_denoiser.o
deleted file mode 100644
index 462cdbb..0000000
Binary files a/third_party/libspecbleach/src/processors/adaptivedenoiser/adaptive_denoiser.o and /dev/null differ
diff --git a/third_party/libspecbleach/src/processors/specbleach_adenoiser.o b/third_party/libspecbleach/src/processors/specbleach_adenoiser.o
deleted file mode 100644
index c3ffb4d..0000000
Binary files a/third_party/libspecbleach/src/processors/specbleach_adenoiser.o and /dev/null differ
diff --git a/third_party/libspecbleach/src/processors/specbleach_denoiser.o b/third_party/libspecbleach/src/processors/specbleach_denoiser.o
deleted file mode 100644
index 6b8734d..0000000
Binary files a/third_party/libspecbleach/src/processors/specbleach_denoiser.o and /dev/null differ
diff --git a/third_party/libspecbleach/src/shared/gain_estimation/gain_estimators.o b/third_party/libspecbleach/src/shared/gain_estimation/gain_estimators.o
deleted file mode 100644
index 89ea85b..0000000
Binary files a/third_party/libspecbleach/src/shared/gain_estimation/gain_estimators.o and /dev/null differ
diff --git a/third_party/libspecbleach/src/shared/noise_estimation/adaptive_noise_estimator.o b/third_party/libspecbleach/src/shared/noise_estimation/adaptive_noise_estimator.o
deleted file mode 100644
index ec8beca..0000000
Binary files a/third_party/libspecbleach/src/shared/noise_estimation/adaptive_noise_estimator.o and /dev/null differ
diff --git a/third_party/libspecbleach/src/shared/post_estimation/noise_floor_manager.o b/third_party/libspecbleach/src/shared/post_estimation/noise_floor_manager.o
deleted file mode 100644
index d22dee7..0000000
Binary files a/third_party/libspecbleach/src/shared/post_estimation/noise_floor_manager.o and /dev/null differ
diff --git a/third_party/libspecbleach/src/shared/post_estimation/postfilter.o b/third_party/libspecbleach/src/shared/post_estimation/postfilter.o
deleted file mode 100644
index b11e7bc..0000000
Binary files a/third_party/libspecbleach/src/shared/post_estimation/postfilter.o and /dev/null differ
diff --git a/third_party/libspecbleach/src/shared/post_estimation/spectral_whitening.o b/third_party/libspecbleach/src/shared/post_estimation/spectral_whitening.o
deleted file mode 100644
index 3e9e7af..0000000
Binary files a/third_party/libspecbleach/src/shared/post_estimation/spectral_whitening.o and /dev/null differ
diff --git a/third_party/libspecbleach/src/shared/pre_estimation/absolute_hearing_thresholds.o b/third_party/libspecbleach/src/shared/pre_estimation/absolute_hearing_thresholds.o
deleted file mode 100644
index 8922f38..0000000
Binary files a/third_party/libspecbleach/src/shared/pre_estimation/absolute_hearing_thresholds.o and /dev/null differ
diff --git a/third_party/libspecbleach/src/shared/pre_estimation/critical_bands.o b/third_party/libspecbleach/src/shared/pre_estimation/critical_bands.o
deleted file mode 100644
index a28c8db..0000000
Binary files a/third_party/libspecbleach/src/shared/pre_estimation/critical_bands.o and /dev/null differ
diff --git a/third_party/libspecbleach/src/shared/pre_estimation/masking_estimator.o b/third_party/libspecbleach/src/shared/pre_estimation/masking_estimator.o
deleted file mode 100644
index 198bac3..0000000
Binary files a/third_party/libspecbleach/src/shared/pre_estimation/masking_estimator.o and /dev/null differ
diff --git a/third_party/libspecbleach/src/shared/pre_estimation/noise_scaling_criterias.o b/third_party/libspecbleach/src/shared/pre_estimation/noise_scaling_criterias.o
deleted file mode 100644
index 79a95a6..0000000
Binary files a/third_party/libspecbleach/src/shared/pre_estimation/noise_scaling_criterias.o and /dev/null differ
diff --git a/third_party/libspecbleach/src/shared/pre_estimation/spectral_smoother.o b/third_party/libspecbleach/src/shared/pre_estimation/spectral_smoother.o
deleted file mode 100644
index 6e79fc3..0000000
Binary files a/third_party/libspecbleach/src/shared/pre_estimation/spectral_smoother.o and /dev/null differ
diff --git a/third_party/libspecbleach/src/shared/pre_estimation/transient_detector.o b/third_party/libspecbleach/src/shared/pre_estimation/transient_detector.o
deleted file mode 100644
index d7789dc..0000000
Binary files a/third_party/libspecbleach/src/shared/pre_estimation/transient_detector.o and /dev/null differ
diff --git a/third_party/libspecbleach/src/shared/stft/fft_transform.o b/third_party/libspecbleach/src/shared/stft/fft_transform.o
deleted file mode 100644
index 67de3f4..0000000
Binary files a/third_party/libspecbleach/src/shared/stft/fft_transform.o and /dev/null differ
diff --git a/third_party/libspecbleach/src/shared/stft/stft_buffer.o b/third_party/libspecbleach/src/shared/stft/stft_buffer.o
deleted file mode 100644
index affbe7c..0000000
Binary files a/third_party/libspecbleach/src/shared/stft/stft_buffer.o and /dev/null differ
diff --git a/third_party/libspecbleach/src/shared/stft/stft_processor.o b/third_party/libspecbleach/src/shared/stft/stft_processor.o
deleted file mode 100644
index d84cf06..0000000
Binary files a/third_party/libspecbleach/src/shared/stft/stft_processor.o and /dev/null differ
diff --git a/third_party/libspecbleach/src/shared/stft/stft_windows.o b/third_party/libspecbleach/src/shared/stft/stft_windows.o
deleted file mode 100644
index 3bce110..0000000
Binary files a/third_party/libspecbleach/src/shared/stft/stft_windows.o and /dev/null differ
diff --git a/third_party/libspecbleach/src/shared/utils/denoise_mixer.o b/third_party/libspecbleach/src/shared/utils/denoise_mixer.o
deleted file mode 100644
index ee3b61d..0000000
Binary files a/third_party/libspecbleach/src/shared/utils/denoise_mixer.o and /dev/null differ
diff --git a/third_party/libspecbleach/src/shared/utils/general_utils.o b/third_party/libspecbleach/src/shared/utils/general_utils.o
deleted file mode 100644
index e4d39e3..0000000
Binary files a/third_party/libspecbleach/src/shared/utils/general_utils.o and /dev/null differ
diff --git a/third_party/libspecbleach/src/shared/utils/spectral_features.o b/third_party/libspecbleach/src/shared/utils/spectral_features.o
deleted file mode 100644
index 16521c2..0000000
Binary files a/third_party/libspecbleach/src/shared/utils/spectral_features.o and /dev/null differ
diff --git a/third_party/libspecbleach/src/shared/utils/spectral_utils.o b/third_party/libspecbleach/src/shared/utils/spectral_utils.o
deleted file mode 100644
index 74687b4..0000000
Binary files a/third_party/libspecbleach/src/shared/utils/spectral_utils.o and /dev/null differ
diff --git a/third_party/rnnoise/librnnoise.a b/third_party/rnnoise/librnnoise.a
deleted file mode 100644
index 49be887..0000000
Binary files a/third_party/rnnoise/librnnoise.a and /dev/null differ
diff --git a/third_party/rnnoise/src/celt_lpc.o b/third_party/rnnoise/src/celt_lpc.o
deleted file mode 100644
index c98d145..0000000
Binary files a/third_party/rnnoise/src/celt_lpc.o and /dev/null differ
diff --git a/third_party/rnnoise/src/denoise.o b/third_party/rnnoise/src/denoise.o
deleted file mode 100644
index 4736b43..0000000
Binary files a/third_party/rnnoise/src/denoise.o and /dev/null differ
diff --git a/third_party/rnnoise/src/kiss_fft.o b/third_party/rnnoise/src/kiss_fft.o
deleted file mode 100644
index 851847d..0000000
Binary files a/third_party/rnnoise/src/kiss_fft.o and /dev/null differ
diff --git a/third_party/rnnoise/src/nnet.o b/third_party/rnnoise/src/nnet.o
deleted file mode 100644
index a7e6f71..0000000
Binary files a/third_party/rnnoise/src/nnet.o and /dev/null differ
diff --git a/third_party/rnnoise/src/nnet_default.o b/third_party/rnnoise/src/nnet_default.o
deleted file mode 100644
index a4e89ff..0000000
Binary files a/third_party/rnnoise/src/nnet_default.o and /dev/null differ
diff --git a/third_party/rnnoise/src/parse_lpcnet_weights.o b/third_party/rnnoise/src/parse_lpcnet_weights.o
deleted file mode 100644
index 6334df0..0000000
Binary files a/third_party/rnnoise/src/parse_lpcnet_weights.o and /dev/null differ
diff --git a/third_party/rnnoise/src/pitch.o b/third_party/rnnoise/src/pitch.o
deleted file mode 100644
index 1f86cac..0000000
Binary files a/third_party/rnnoise/src/pitch.o and /dev/null differ
diff --git a/third_party/rnnoise/src/rnn.o b/third_party/rnnoise/src/rnn.o
deleted file mode 100644
index 0800175..0000000
Binary files a/third_party/rnnoise/src/rnn.o and /dev/null differ
diff --git a/third_party/rnnoise/src/rnnoise_data.o b/third_party/rnnoise/src/rnnoise_data.o
deleted file mode 100644
index dbab3b9..0000000
Binary files a/third_party/rnnoise/src/rnnoise_data.o and /dev/null differ
diff --git a/third_party/rnnoise/src/rnnoise_data_1.o b/third_party/rnnoise/src/rnnoise_data_1.o
deleted file mode 100644
index 00d42ba..0000000
Binary files a/third_party/rnnoise/src/rnnoise_data_1.o and /dev/null differ
diff --git a/third_party/rnnoise/src/rnnoise_data_2.o b/third_party/rnnoise/src/rnnoise_data_2.o
deleted file mode 100644
index ace9429..0000000
Binary files a/third_party/rnnoise/src/rnnoise_data_2.o and /dev/null differ
diff --git a/third_party/rnnoise/src/rnnoise_data_3.o b/third_party/rnnoise/src/rnnoise_data_3.o
deleted file mode 100644
index 4e786e5..0000000
Binary files a/third_party/rnnoise/src/rnnoise_data_3.o and /dev/null differ
diff --git a/third_party/rnnoise/src/rnnoise_data_4.o b/third_party/rnnoise/src/rnnoise_data_4.o
deleted file mode 100644
index 62aa121..0000000
Binary files a/third_party/rnnoise/src/rnnoise_data_4.o and /dev/null differ
diff --git a/third_party/rnnoise/src/rnnoise_data_5.o b/third_party/rnnoise/src/rnnoise_data_5.o
deleted file mode 100644
index ad91f72..0000000
Binary files a/third_party/rnnoise/src/rnnoise_data_5.o and /dev/null differ
diff --git a/third_party/rnnoise/src/rnnoise_data_6.o b/third_party/rnnoise/src/rnnoise_data_6.o
deleted file mode 100644
index 7901f58..0000000
Binary files a/third_party/rnnoise/src/rnnoise_data_6.o and /dev/null differ
diff --git a/third_party/rnnoise/src/rnnoise_tables.o b/third_party/rnnoise/src/rnnoise_tables.o
deleted file mode 100644
index 363ae4b..0000000
Binary files a/third_party/rnnoise/src/rnnoise_tables.o and /dev/null differ